Keystone Sports & Entertainment LLC is a sports ownership group that primarily owns and operates the Philadelphia Union, a Major League Soccer (MLS) team based in Chester, Pennsylvania. The company was founded in 2008 when Philadelphia was awarded an MLS expansion team. The ownership group is led by Jay Sugarman, who serves as the principal owner and chairman. The company manages Subaru Park (formerly Talen Energy Stadium), an 18,500-seat soccer-specific stadium located along the Delaware River waterfront. Beyond the professional team operations, Keystone Sports & Entertainment oversees the Philadelphia Union Academy, a youth development program that has produced several professional players, and the Union II (formerly Bethlehem Steel FC), the club’s reserve team that competes in MLS Next Pro. The organization has expanded its influence in the Philadelphia sports market through various community initiatives and partnerships. They have invested significantly in youth soccer development and local infrastructure, including the construction of the Power Training Complex, a state-of-the-art training facility for the first team and academy players. Under Keystone Sports & Entertainment’s management, the Philadelphia Union has grown into one of MLS’s more successful franchises, reaching the MLS Cup Final in 2022.